Stage Div, AugShell Visuals, main.css

Added main.css files for generic or unsorted css modifcations.

Added a stage div so things can be put "backstage".

Moved "real" console terminal backstage.

Cleaned up visuals of augShell: appended input to the top instead of
fixed at the bottom, new inputs are prepended to the input instead of
appended to the top.

Did some css styling to improve visuals.